Finding the Fourth Proportional to 78,384.42, 117,496.08 and 30,980.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,384.42 : 117,496.08 = 30,980.25 : x
2. Step 2: Convert to fraction form
   78,384.42/117,496.08 = 30,980.25/x
3. Step 3: Cross multiply
   78,384.42x = 117,496.08 × 30,980.25
4. Step 4: Simplify right side
   78,384.42x = 3,640,057,932.42
5. Step 5: Solve for x
   x = 3,640,057,932.42/78,384.42
6. Step 6: Final answer
   x = 46,438.54